Electric relay.



H. A. PARRISH.

ELECTRIC RELAY.

APPLICATION FILED sEPT.2'3.1914.

Patented Nov. 23, 1915.

in the copending UNITED STATES OFFICE.

HOMER A. PARRISH, OI KALAMAZOO, MICHIGAN,

ASSIGNOB OF ONE-TENTH TO G.

EDWIN mmma, or mamo mcnmm.

nnncrmc BEIAYQ To all whom it may concern:

Be it known that I, HOMER A. PARRISH, a citizen of the United States, residing at 832 South Rose street, city and county of Kalamazoo, and State of Michigan, have invented certain new and useful Improvements in Electric Relays, of which the following is a specification.

This invention relates to improvements in electric relays and especially to improvements in the structure shown and described application of Homer A. Parrish, Serial 0. 807,323, filed December 17, 1913.

The object of this invention is to provide an improved electric relay which can be quickly and easily adjusted so as to operate either on a normally open circuit or on a normally closed circuit.

Further objects, and objects relating to details and economies of construction and operation will readily appear from the detailed description to follow.

I accomplish the objects of my invention y the devices and means described in the following specification.

The invention is clearly defined and pointed out in the claims.

A structure constituting a preferred embodiment of my invention is clearly illustrated in the accompanying drawing forming a part of this specification, in which:

igure I is a front elevation view of a structure embodying my invention showing the parts adjusted for use on a normally closed circuit. Fig. II is a fragmentary front elevation view corresponding to a part of Fig. I, showing the parts in the position to which they areadjusted for use on a normally open circuit. Fig. III is an enlarged detail sectional view on the line 33 of Fig. II, showing the manner in which the trip rod is adjustably mounted in the end of the armature. I

In the drawing, similar reference characters refer to similar parts throughout the several views, and the sectional views are taken looking in the direction of the little arrows at the ends of the section lines.

Considering the numbered parts of the drawing, 1 is the casing of the relay to which are secured the solenoids 2. The ends of the solenoid winding are connected by means of the wires 3 and 4 respectively with the binding posts 5 and 6. The bracket 7 is Specification of Letters Patent.

Application filed September 23, 1914. Serial No. 883,076.

Patented Nov. 23, 1915.

secured to the bottom of the relay casing and the armature 8 is pivotally mounted in said bracket 7 by means of the screw ins 9, as shown in Fig. III. A longitudina passage 10 .is provided in said armature and a trip rod 11 having a laterally turned upper end 12 is slidably mounted in said passage 10 and held in adjusted position by the set screw 13.

A bell crank detent or pawl 14 is pivoted at 15 in the upper part of the case and has a tail lfi-exten in downwardly in position to be-engaged by t e upper end of the trip rod 11. trip lever18 is pivotally mounted at 17, in the case, and the upper end 19 of said lever is turned laterally and adapted to engage the tail 16 of the bell crank pawl 14. The lower end20 of the trip lever, below the fulcrum 17 is adapted to be engaged by the laterally turned end 12 of the trip rod 11 when the latter is adjusted inthe armature 8 to the position shown in Fig. II.

A bracket 21, secured to the relay case, has a part 22 extending upwardl the upper end thereof serving as a stop to limit the movement of the bell crank pawl 14 and also to limit the rearward movement of the contact plate 23 which is pivotally mounted at 23' on said bracket 21. The end of said bell crank pawl 14 is provided with a notch 24 which is adapted to engage the upper end of the contact plate 23 to hold it in the position shown in Fig. I. The case carries an adjustable stop screw 25 to limit the upward movement of the bell crank pawl 14. An adjustable contact pin 27 is mounted at 26 on the case and when said bell crank lever 14 is raised to release the contact plate 23 the latter rests on the end of the contact pin 27. The contact plate 23 is connected by wire 28 with the binding post 30 and the contact pin 27 is connected by wire 29 with the binding post 31. 'It will thus be seen that when the parts are in the position shown in Fig. I, the circuit through 30 to 31 is broken, but that when the bell crank pawl 14 is raised to allow the contact plate to drop so as to rest upon the contact pin the circuit will be closed between 30 and 31. The binding posts 30 and 31 are connected with a signal circuit so that when contact plate 23 rests on contact pin 27 the signal circuit is closed to operate the lights or other signaling means. p

I Solenoids 32, 32 are secured to the side of the relay case, the ends of the solenoid windupwardly in position to be engaged by the bell crank pawl 14. Springs 42 are connected at one end to the armatures 8 and 36 respectively and at the other ends to the bolts 43 which are adjustably carried by the brackets 45 and 46 respectively. An adjustable stop pin 47 is also provided to limit the rearward movement of the armature 36.

Fig. I shows the parts adjusted for operation by a normally closed circuit. In. this position, the trip rod 11 is adjusted in the armature 8 so that the laterally turned end 12 thereof extends near the tail 16 of the bell crank pawl 14. The circuit through the binding posts 5 and 6, wires 3 and 4 and the solenoids 32 is a normally closed circuit. When that circuit is broken for any reason, the spring 42 will pull the armature 8 away from the solenoids and cause the end 12 of the trip rod 11 to engage the tail 16 of the bell crank pawl 14 so as to lift the latter and allow the contact plate 23 to fall into engagement with the contact pin 27, so as to close thecircuit. When the circuit through the binding posts 6 and 35,

wires 33 and 34 and solenoids 32 is closed,

armature 36 is drawn toward the solenoid with the push rod 39 and ball 41 engages the contact plate 23 and forces it rearwardly until the upper end thereof is engaged by the bell crank pawl 14 so that the contact plate 23 is held out of engagement with the ment the trip rod 11 is adjusted in the armature 8 so that the laterally directed end 12 thereof is turned, as shown in Fig. II, into position to engage the tail 20 of the trip lever 18. In this position, when the normally open circuit through the solenoids 2 is closed, the armature will engage the solenoid and the end 12 of the trip rod 11 will engage the tail 20 of the trip lever 18 and cause the upper end 19 thereof to force the tail 16 of the bell crank pawl 14 to the right so as to release the contact plate 23 to close the signaling circuit. The contact plate is reset by means .of the solenoids 32 exactly as when the signal is operated by the closedcircuit. It will be seen that, by this arrangemature 8 so that the end thereof will either.

engage the tail 16 of the bell crank pawl 14 or will engage the tail 20 of the trip lever 18 and actuate the latter to move the bell crank pawl 14.

I am aware that the particular structure which I have here shown is susceptible of considerable variation without departing from the spirit of my invention, andtherefore I do not wish to be restricted to the same. I have found, however, that this form is to .be preferred and therefore I desire to claim the same specifically as well as broadly as indicated by my appended claims.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent, is:

1. In a device of the class described, the combination of a casing, a post secured to the side wall of said casing, a contact pin adjustably mounted in said post, a. contact plate pivotally mounted in said casing so as to move into engagement with said contact pin, a bell crank pawl pivotally mounted in said casing, said pawl being provided with a notch in the upper arm thereof adapted to engage the top of said contact plate to hold it out of engagement with said contact pin, a trip lever pivotally mounted in said casing, one arm of said trip lever being disposed in proximity to the tail of said bell crank pawl, an electro-magnet, a pivoted armature for said magnet, a spring secured to said armature and tending to draw the same away from said magnet, said armature being provided with a. longitudinal passage therein, a trip rod adjustably mounted in said pamage, said trip rod being adapted to be adjusted in said armature to engage either the tail of said bell crankpawl or the tail of said trip lever, a second electro-magnet, a pivoted armature for said magnet, a spring tending to draw said armature away from the magnet, a push rod carried by said armature, and a ball of insulating material secured on the end of saidpush rod in position to engage the contact plate, all coacting substantially as described and for the purpose specified.

2. In a device of the class described, the

combination of a casing, a post secured to the side wall of said casing, a contact pin adjustably mounted in said post, a contact as to move into en agement' with said contact pin, a bell cran pawl pivotally mounted in said casing, said pawlbeing provided with a notch in the upper arm thereof adapted to engage the top of said contact plate to hold it out of engagement with said contact pin, a trip lever pivotally mounted in said casing, one arm of said trip lever being disposed in proximity to the tail of said bell crank pawl, an electro-magnet, a pivoted armature for said magnet, said armature being provided with a longitudinal passage therein, a trip rod adjustably mounted in said passage, said trip rod being adapted to be adjusted in said armature to engage either the tail of said bell crank pawl or the tail of said trip lever, a second electro-magnet, a pivoted armature for said ma et, a push rod carried by said armature, amf a ball of insulating material secured on the end of said push rod in engage the contact plate, all stantially as described and pose specified.

3. In a device of the class described, the combination of a casing, a post secured to the side wall of said casing, a contact pin adjustably mounted in said post, a contact plate pivotally mounted in said casing so as to move into engagement with said contact pin, a bell crank pawl pivotally mounted in said casing, said pawl being provided with a notch in the upper arm thereof adapted to engage the top of said contact plate to hold it out of engagement with said contact pin, a trip lever pivotally mounted in said casing, one arm of said trip lever being disposed in proximity to the tail of said bell crank pawl, an electromagnet, a pivoted armature for said magnet, a trip rod adjustably carried by said armature and position to coacting subfor the -pur adapted to be adjusted so as to engage either said bell crank or said trip lever, a second electro-magnet, a pivoted armature for said magnet, a push rod carried by said armature, and a ball of insulating material secured on the end of said push rod in position to engage the contact plate, all coacting substangially as described and for the purpose speci- 4. In a device of the class described, the combination of a casing, a contact member, a second contact member mounted-so as to move into engagement with the first contact member, a bell crank pawl mounted so as to engage said second contact member and hold it out of engagement with the first contact member, an electro-magnet, a pivoted armature for said magnet, a trip lever pivotally mounted in said casing, one arm of said trip lever being disposed in proximity to the tail of said bell crank pawl, said armature being provided with a longitudinal passage therein, a trip rod adjustably mounted in said passage and adapted to be combination of a casing,

tact member, a pawl having a projecting tail mounted so as to engage said second contact member and hold it out of engagement with the first contact member, an electro-magnet, a pivoted armature for said magnet, a trip lever pivotally mounted in said casing, one arm of said trip lever being disposed in proximity to the tail of said pawl, a trip rod adjustably carried by said armature and adapted to be adjusted to engage either said pawl or the said trip lever to actuate said pawl, a second electro-magnet, and means controlled by the energizing of said magnet for moving said second contact member out of engagement with the first contact member, all coacting substantially as described and for the purpose specified.

6; In a device of the class described, the combination of a casing, a fixed contact member, a movable contact member adapted to move into engagement with said fixed contact member, a pawl engaging said movable member and holding it out of engagement with said fixed member, an electro-magnet, an armature therefor, means adjustably carried by said armature and adapted to be adjusted to two positions, means to coact with said adjustable means to release said contact member so that in one of said positions movement of the armature away from the magnet actuates the pawl to release the movable contact member, in the other of said positions movement of the armature toward the magnet actuates the pawl to release said movable contact member, a second electromagnet, and means controlled by the energizing of said magnet for moving said movable contact member out of engagement with the fixed contact member, all coacting substantially as described and for the purpose specified. I

7. In a device of the class described, the combination of a casing, a contact member, a second contact member mounted so as to move into engagement with the first contact member, a pawl having a projecting tail mounted so as to engage said second contact member and hold it out of engagement with the first contact member, an electro-magnet, a pivoted armature for said magnet, a trip lever pivotally mounted in said casing, one arm of said trip lever being disposed in proximity to the tail of said pawl, and a trip rod adjustably carried by said armature and adapted to be adjusted to engage either said pawl or the said trip lever to actuate said pawl, all coacting substantially as described and for the purpose specified.

8. In a device of the class described, the combination of a casing, a fixed contact member, amovable contact member adapted to move into engagement with said fixed contact member,-a pawl engaging said movable member and holding it out of engagement with said fixed member, an electromagnet, an armature therefor, and means adjustably carried by said armature and adapted to be adjusted to two positions, means to coact with said adjustable means to release said contact member so that in one of said positions movement of the armature away from the magnet actuates the pawl to release the movable contact member, in the other of said positions movement of the armature toward the magnet actuates the pawl to release said movable contact member, all coacting substantially as described and for the purpose specified.

In witness whereof, I have hereunto set my hand and seal in the presence of two witnesses.

HOMER A. PARRISH. [1,. 5.] 

